Question

我有一个简单的表格，上面有名字和分数。我想做的是制作一份名单及其平均分数，其平均值大于该组的平均值。

我有以下SQL语句适用于Access但不适用于我的服务器（运行MySql）：

SELECT Person, Avg(Score) AS PersonAverage FROM TblScores GROUP BY Person HAVING (((Avg(Score))>(SELECT Avg(Score) AS AverageOfAllScores FROM TblScores;)));

服务器说语法错误但我看不到哪里。有任何想法吗？感谢

Answer 1

您不需要第一个;，因为它是一个语句终止符。
改变这个：

SELECT Person, Avg(Score) AS PersonAverage FROM TblScores GROUP BY Person HAVING (((Avg(Score))>(SELECT Avg(Score) AS AverageOfAllScores FROM TblScores;)));

用这个：

 SELECT Person, Avg(Score) AS PersonAverage FROM TblScores GROUP BY Person HAVING (((Avg(Score))>(SELECT Avg(Score) AS AverageOfAllScores FROM TblScores)));

SQL查询将个人平均值与组平均值进行比较

1 个答案: